/**
  ******************************************************************************
  * @file    usbd_cdc_if_template.c
  * @author  MCD Application Team
  * @version V1.1.0
  * @date    19-March-2012
  * @brief   Generic media access Layer.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2>
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
  */

#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
#pragma     data_alignment = 4
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */

/* Includes ------------------------------------------------------------------*/
#include "usbd_cdc_if_template.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* These are external variables imported from CDC core to be used for IN
   transfer management. */
extern uint8_t  APP_Rx_Buffer []; /* Write CDC received data in this buffer.
                                     These data will be sent over USB IN endpoint
                                     in the CDC core functions. */
extern uint32_t APP_Rx_ptr_in;    /* Increment this pointer or roll it back to
                                     start address when writing received data
                                     in the buffer APP_Rx_Buffer. */

/* Private function prototypes -----------------------------------------------*/
static uint16_t TEMPLATE_Init(void);
static uint16_t TEMPLATE_DeInit(void);
static uint16_t TEMPLATE_Ctrl(uint32_t Cmd, uint8_t *Buf, uint32_t Len);
static uint16_t TEMPLATE_DataTx(uint8_t *Buf, uint32_t Len);
static uint16_t TEMPLATE_DataRx(uint8_t *Buf, uint32_t Len);

CDC_IF_Prop_TypeDef TEMPLATE_fops =
{
    TEMPLATE_Init,
    TEMPLATE_DeInit,
    TEMPLATE_Ctrl,
    TEMPLATE_DataTx,
    TEMPLATE_DataRx
};

/* Private functions ---------------------------------------------------------*/

/**
  * @brief  TEMPLATE_Init
  *         Initializes the CDC media low layer
  * @param  None
  * @retval Result of the opeartion: USBD_OK if all operations are OK else USBD_FAIL
  */
static uint16_t TEMPLATE_Init(void)
{
    /*
       Add your initialization code here
    */
    return USBD_OK;
}

/**
  * @brief  TEMPLATE_DeInit
  *         DeInitializes the CDC media low layer
  * @param  None
  * @retval Result of the opeartion: USBD_OK if all operations are OK else USBD_FAIL
  */
static uint16_t TEMPLATE_DeInit(void)
{
    /*
       Add your deinitialization code here
    */
    return USBD_OK;
}


/**
  * @brief  TEMPLATE_Ctrl
  *         Manage the CDC class requests
  * @param  Cmd: Command code
  * @param  Buf: Buffer containing command data (request parameters)
  * @param  Len: Number of data to be sent (in bytes)
  * @retval Result of the opeartion: USBD_OK if all operations are OK else USBD_FAIL
  */
static uint16_t TEMPLATE_Ctrl(uint32_t Cmd, uint8_t *Buf, uint32_t Len)
{
    switch(Cmd)
    {
        case SEND_ENCAPSULATED_COMMAND:
            /* Add your code here */
            break;

        case GET_ENCAPSULATED_RESPONSE:
            /* Add your code here */
            break;

        case SET_COMM_FEATURE:
            /* Add your code here */
            break;

        case GET_COMM_FEATURE:
            /* Add your code here */
            break;

        case CLEAR_COMM_FEATURE:
            /* Add your code here */
            break;

        case SET_LINE_CODING:
            /* Add your code here */
            break;

        case GET_LINE_CODING:
            /* Add your code here */
            break;

        case SET_CONTROL_LINE_STATE:
            /* Add your code here */
            break;

        case SEND_BREAK:
            /* Add your code here */
            break;

        default:
            break;
    }

    return USBD_OK;
}

/**
  * @brief  TEMPLATE_DataTx
  *         CDC received data to be send over USB IN endpoint are managed in
  *         this function.
  * @param  Buf: Buffer of data to be sent
  * @param  Len: Number of data to be sent (in bytes)
  * @retval Result of the opeartion: USBD_OK if all operations are OK else USBD_FAIL
  */
static uint16_t TEMPLATE_DataTx(uint8_t *Buf, uint32_t Len)
{
    /* Get the data to be sent */
    for(i = 0; i < Len; i++)
    {
        /* APP_Rx_Buffer[APP_Rx_ptr_in] = XXX_ReceiveData(XXX); */
    }

    /* Increment the in pointer */
    APP_Rx_ptr_in++;

    /* To avoid buffer overflow */
    if(APP_Rx_ptr_in == APP_RX_DATA_SIZE)
    {
        APP_Rx_ptr_in = 0;
    }

    return USBD_OK;
}

/**
  * @brief  TEMPLATE_DataRx
  *         Data received over USB OUT endpoint are sent over CDC interface
  *         through this function.
  *
  *         @note
  *         This function will block any OUT packet reception on USB endpoint
  *         untill exiting this function. If you exit this function before transfer
  *         is complete on CDC interface (ie. using DMA controller) it will result
  *         in receiving more data while previous ones are still not sent.
  *
  * @param  Buf: Buffer of data to be received
  * @param  Len: Number of data received (in bytes)
  * @retval Result of the opeartion: USBD_OK if all operations are OK else USBD_FAIL
  */
static uint16_t TEMPLATE_DataRx(uint8_t *Buf, uint32_t Len)
{
    uint32_t i;

    /* Send the received buffer */
    for(i = 0; i < Len; i++)
    {
        /* XXXX_SendData(XXXX, *(Buf + i) ); */
    }

    return USBD_OK;
}

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
